我每天骑自行车上学.今天早上我从车库推自行车时,旁边的电动车突然发出了报警声,可是我并没有碰到这辆电动车呀,车上的警报器为什么会响呢?周末,我和爸爸决定利用借来的仪器,探究电动车警报器报警的原因.下面是我的探究过程.由于我在推车时没有碰到旁边的电动车,我猜想:电动车警报器发出警报是我推车发出的声音引起的,警报器报警与周围声音 I ride a bike to school every day.This morning when I was pushing a bicycle from the garage, the electric car next to it suddenly made an alarm sound, but I did not run into the electric car. Why did the alarm on the car ring? Weekends, I And my dad decided to use the borrowed instrument to explore the cause of the electric car siren alarm. Here is my exploration process. Since I did not touch the electric car next to the car, I suspect that the electric car siren is my Siren caused by siren, siren alarm with ambient sound